Plants that are efficient at taking iron up from a calcareous soil are known to employ which of the following methods? A)lower pH of their rhizosphere B)produce reducing agents that reduce Fe³⁺ to Fe²⁺ in the rhizosphere. C)produce organic compounds that can form stable chelates with iron. D)all of the above E)none of the above

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Quizplus · Accepted Answer

Plants that are efficient at taking iron up from a calcareous soil employ all of the methods listed. Lowering the pH of the rhizosphere can help solubilize iron ions from the soil, while producing reducing agents can convert insoluble iron (such as FeS) into a more soluble form. Finally, producing organic compounds that can form stable chelates with iron can help to make it more available for uptake.

Plants That Are Efficient at Taking Iron Up from a Calcareous